Sheppard, P. M. (1960). Natural selection and heredity. New York: Harper and Brothers.
Čikaški stil citiranjaSheppard, P. M. Natural Selection and Heredity. New York: Harper and Brothers, 1960.
MLA način citiranjaSheppard, P. M. Natural Selection and Heredity. New York: Harper and Brothers, 1960.
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